1+2+3+4+5.... +20 what is its sum
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Step-by-step explanation:
sum of first n natural numbers = n(n + 1)/2
sum of first 20 natural numbers = 20 * 21 / 2 = 210
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Answer:
Step-by-step explanation:
210 is a sum of number series from 1 to 20 by applying the values of input parameters in the formula.
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